论文部分内容阅读
对复杂非均匀构造上采集的时间剖面的正确处理和解释,声学假设已经不太充分,需要考虑弹性效应。本文的研究介绍了用傅里叶方法所获得的数值模拟结果。我们还考虑了两类重要的地球物理问题。第一类是波在垂向与水平方向上均为非均质构造中的传播问题。计算结果表明,对于这类问题,会产生强大的转换相位和首波。这些相位的产生主要是由介质中速度的反差造成的。第二类问题是波在含液体和固体的构造中的传播。在液体区域内记录到的时间剖面再次表明,这类问题也产生强大的转换相位且容易误释为纯声波反射。液体—固体模型的数值结果与物理模型是一致的。
Correctly processing and interpreting the time profiles collected on complex, inhomogeneous structures, the acoustic assumptions are less than adequate and elastic effects need to be considered. The research in this paper introduces the numerical simulation results obtained by the Fourier method. We also considered two important types of geophysical issues. The first is the propagation of waves in both inhomogeneous and horizontal directions. The results show that, for such problems, will have a strong conversion phase and the first wave. The production of these phases is mainly caused by the contrast of the medium speed. The second type of problem is the propagation of waves in structures containing liquids and solids. The time profiles recorded in the fluid area again show that such problems also produce a strong phase shift and are easily misinterpreted as pure acoustic reflections. The numerical results of the liquid-solid model are consistent with the physical model.